Lymphatic system

Question 1

Lymphatic system definition

Answer 1

A secondary circulatory system that is dead ending vessels and lymph nodes

Question 2

Lymph formation

Answer 2

High blood pressure in the arteries cause fluid and small proteins to be forced out of blood plasma

This tissue fluid is called Extra cellular fluid (ECF)

ECF surrounds body cells

ECF is made continuously so it must be removed

Question 3

The return of ECF

Answer 3

90% returns to capillaries
10% returns to lymph vessels
Liquid is now lymph (contains WBC , fats , proteins)

Question 4

Lacteal

Answer 4

Transports fatty acids and glycerol to lymph vessels

Question 5

Lymph vessels

Answer 5

Ensure that blood flows in one direction using valves

Vessels combine to form right lymphatic duct (located at right shoulder) and thoracic duct

Vessels contain lymph nodes
Thoracic and right lymphatic duct are the main vessels

Question 6

Lymphatic system functions

Answer 6

To collect ECF and return it to blood

Fights again infections by filtration , stores lymphocytes and destroys micro organisms

Absorb and transport fats in digestive system , lymph found in lacteals

Question 7

Lymph nodes

Answer 7

Fight infection
-filter bacteria and other harmful material from lymph

Mature and store a large no of lymphocytes

Question 8

How does lymph move in the lymph vessels?

Answer 8

General body movements
Muscles in vessel walls

Question 9

Lymph nodes

Answer 9

Swelling found along lymph vessels
Filter bacteria
Store lymphocytes (WBCS) some kill bacteria and others produce antibodies